That sound you hear? That's the sound of a house of cards tumbling down.

There's quite a lot of misinformation on the web about this whole thing. First and foremost, the crux of the matter here is that it's the EU's job to protect the internal market, and to ensure that there's a level playing field between its various member states, and it does this through a number of regulations, laws, and codes that member states must adhere to. Whether you, personally, agree with this goal or not is irrelevant; Ireland is part of the EU single market and signed the dotted line - and this comes with the responsibility of implementing, adhering to, and upholding said regulations, laws, and codes.

Second, the EU claims that the special deals the Irish government gave to Apple are a form of illegal state aid; something many other companies have been fined and punished for as well. It's just that with a company the size of Apple, and the extensiveness of the tax-lowering deal Ireland gave to Apple, the illegal state aid easily reaches monstrous proportions.

Third, this isn't some EU manhunt or vendetta specifically targeting American companies; European companies have been fined time and time again for shady practices as well. And, just to be pedantic - technically speaking, Apple itself (the American company) isn't paying these taxes; various European shell companies owned and created by Apple are.

Fourth, there's a distinct and clear public opinion in Europe - and in the US as well, see e.g. the rise and popularity of Bernie Sanders - that seemingly, laws do not seem to apply to the extremely rich and wealthy. The EU and various member state governments - including my own - are starting to adapt to public opinion, taking concrete steps to end these shady tax deals and tax avoidance schemes that allow large, wealthy companies to pay effectively little to no taxes, while us 'normal' people and small business owners pay our fair share.

The main sticking point here is that the EU wants to makes sure that merely being rich and large should not give a company undue benefits that competitors simply cannot compete against. Proper capitalism only works when there's a level playing field where competition is based on merit, and not on who can dangle the biggest sack of money in front of the Irish or Dutch governments.

Claims that the United States’ corporate tax rate is uniquely burdensome to U.S. business when compared with the corporate tax rates of its industrial peers are incorrect. While the United States has one of the highest statutory corporate income-tax rates among advanced countries, the effective corporate income-tax rate (27.7 percent) is quite close to the average of rich countries (27.2 percent, weighted by GDP).

The U.S. corporate income-tax rate is also not high by historic standards. The statutory corporate tax rate has gradually been reduced from over 50 percent in the 1950s to its current 35 percent.

The current U.S. corporate tax rate does not appear to be impeding corporate profits. Both before-tax and after-tax corporate profits as a percentage of national income are at post–World War II highs; they were 13.6 percent and 11.4 percent, respectively, in 2012.

Lowering the corporate income-tax rate would not spur economic growth. The analysis finds no evidence that high corporate tax rates have a negative impact on economic growth (i.e., it finds no evidence that changes in either the statutory corporate tax rate or the effective marginal tax rate on capital income are correlated with economic growth).

The effective tax rate does not hit all industries equally. Some industries (like energy) receive great amounts of corporate welfare from the government. Tech in particular does not get much of this corporate welfare.

You can't argue that the US corporate tax rate creates a huge incentives for tech to park profits offshore.

You need to consider this industry by industry since there is huge variance in the impact. For example, you don't hear the energy companies complaining about this.